You're welcome - glad it was helpful
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My Wylie was on Cushings meds from about age 4.5 to when he passed as a senior. It's true that most Cushings meds are quite toxic - but they're given in low doses in order to manage the effects of the excessive cortisol that's in the body due to the Cushings. At age 16, I'd be thinking of that tender age and weighing everything else together. My Wylie never had a single side effect from his meds, and many dogs do very well on them actually. And btw, most generalist vets have very little experience with Cushings...trust me....